EP 0831568 A3 19990804 - A dual harmonic-wavelength split-frequency laser
Title (en)
A dual harmonic-wavelength split-frequency laser
Title (de)
Frequenz-Getrenntlagelaser mit zwei harmonischen Wellenlängen
Title (fr)
Laser à division en fréquence à deux longueurs d'onde harmoniques
Publication
Application
Priority
US 71738696 A 19960920
Abstract (en)
[origin: EP0831568A2] The ideal source for air-turbulence-corrected distance-measuring interferometry is a single laser that generate overlapping beams at two widely separated wavelengths lambda 1 and lambda 2. At least one of the wavelengths, as well as the wavelength ratio, must be known to high degrees of accuracy. Furthermore, at each wavelength, the laser should produce a pair of orthogonally polarized frequencies with a frequency splitting that is adjustable over the range of approximately 0.5 MHz to 20 MHz to facilitate AC interferometric distance measurements with a variety of measurement-mirror velocities. <IMAGE>
IPC 1-7
IPC 8 full level
G02F 1/37 (2006.01); G01B 9/02 (2006.01); H01S 3/06 (2006.01); H01S 3/109 (2006.01); H01S 3/08 (2006.01)
CPC (source: EP US)
G01B 9/02007 (2013.01 - EP US); H01S 3/109 (2013.01 - EP US); G01B 2290/70 (2013.01 - EP US); H01S 3/0809 (2013.01 - EP US)
Citation (search report)
- [A] US 5263038 A 19931116 - LUKAS GREGORY J [US], et al
- [A] EP 0329442 A2 19890823 - AMOCO CORP [US]
- [A] US 5091912 A 19920225 - BRETENAKER FABIEN [FR], et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 096, no. 003 29 March 1996 (1996-03-29)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0831568 A2 19980325; EP 0831568 A3 19990804; EP 0831568 B1 20021211; DE 69717748 D1 20030123; DE 69717748 T2 20030710; JP 3798127 B2 20060719; JP H10107357 A 19980424; SG 54503 A1 19981116; US 5732095 A 19980324
DOCDB simple family (application)
EP 97306896 A 19970905; DE 69717748 T 19970905; JP 23938697 A 19970904; SG 1997001380 A 19970505; US 71738696 A 19960920